Grease strainer for journal boxes



April 7, 1925.

F. F. GUERRA GREASE STRAINER FOR JOURNAL BoxEs Filed Nov. 12, 1924 'g1/wanton a@ www Patented pr. 7, 1925.

'PATENT OFFICE.

FRANCISCO FLORE-S GUERRA, OF MEXICO CITY, MEXICO.

GREASE'STRAINER FOR JOURNAL BOXES.

Application led November 12, 1924. Serial No. 749,523.

T @ZZ 107mm it may concern.'

Be it known that I, FRANCISCO F LoREs GUERRA, a citizen of the United Mexican States, residing at Mexico City, Federal Distriet, Mexico, have invented certain new and useful Improvements in Grease Strainers for Journal Boxes, of which the following is a specification.

rI`his invention relates to a grease strainer for the journal boX of locomotive driving wheels. The object of this invention is to construct a gre-ase strainer which shall avoid the damage commonly done to the journals when particles and chips are torn from the strainer and scratch the journal.

Generally such greases strainers are made from rather hard sheet metal which when worn thin are first cracked, and later on 'chips are broken on1 and carried together with the grease between the journal and the axle brass whence they forni a serious obstruction giving rise to the warming and wearing of the journals, so that the locomotive must be stopped until the journals are cooled off.

So far grease strainers have been manufactured from rather thin sheet metal and of a hard consistenee. My grease strainer is made of a metal alloy 90% lead, 9%

antimony and 1% tin, though pure aluminium may be used, and the perforations are oval and conical so as to offer less probability of destruction and resulting breaking off of chips.

In the drawing:

Fig. 1 is a longitudinal cross section o-f a journal box with my grease strainer.

Fig. 2 is a transversal cross section of saine.

The journal boX (1) is provided with a 40 grease supporting plate (2) normally forced against the strainer (3) by the spiral spring (4) as in the common and known constructions.

The strainer (3) of rather thick plate al- 45 loy is curved to adapt itself to the journal, and carries oval conical perforations through which the grease from between the Vplate (2) and strainer (3) is forced.

Even if small pieces of the strainer should be torn off, the alloy is so soft that any clip could not produce any damage to the journal surface.

Having thus described my invention what I claim is: Y

A grease strainer for journal boxes of locomotive driving wheels, comprising a curved alloy body composed of 90% lead, 90% antimony and 1% tin, provided with oval conical perforations disposed in stag- 60 gered position. i

In testimony whereof I have atlixed my signature.

FRANCISCO FLORES GUERRA. 

